.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
.\" and Copyright 2008, Linux Foundation, written by Michael Kerrisk
.\"     <mtk.manpages@gmail.com>
.\"
.\" %%%LICENSE_START(GPL_NOVERSION_ONELINE)
.\" Distributed under GPL
.\" %%%LICENSE_END
.\"
.TH FMAX 3 2016-07-17 "" "Linux Programmer's Manual"
.SH NAME
fmax, fmaxf, fmaxl \- determine maximum of two floating-point numbers
.SH SYNOPSIS
.B #include <math.h>
.sp
.BI "double fmax(double " x ", double " y );
.br
.BI "float fmaxf(float " x ", float " y );
.br
.BI "long double fmaxl(long double " x ", long double " y );
.sp
Link with \fI\-lm\fP.
.sp
.in -4n
Feature Test Macro Requirements for glibc (see
.BR feature_test_macros (7)):
.in
.sp
.ad l
.BR fmax (),
.BR fmaxf (),
.BR fmaxl ():
.RS 4
_ISOC99_SOURCE || _POSIX_C_SOURCE\ >=\ 200112L
.RE
.ad
.SH DESCRIPTION
These functions return the larger value of
.I x
and
.IR y .
.SH RETURN VALUE
These functions return the maximum of
.I x
and
.IR y .

If one argument is a NaN, the other argument is returned.

If both arguments are NaN, a NaN is returned.
.SH ERRORS
No errors occur.
.SH VERSIONS
These functions first appeared in glibc in version 2.1.
.SH ATTRIBUTES
For an explanation of the terms used in this section, see
.BR attributes (7).
.TS
allbox;
lbw24 lb lb
l l l.
Interface	Attribute	Value
T{
.BR fmax (),
.BR fmaxf (),
.BR fmaxl ()
T}	Thread safety	MT-Safe
.TE
.SH CONFORMING TO
C99, POSIX.1-2001, POSIX.1-2008.
.SH SEE ALSO
.BR fdim (3),
.BR fmin (3)
